Machine element or mechanism – Gearing – Interchangeably locked
Patent
1991-09-06
1992-07-14
Lorence, Richard
Machine element or mechanism
Gearing
Interchangeably locked
74866, 74867, 3644241, B60K 4108
Patent
active
051292742
ABSTRACT:
A shift interlock mechanism for an automatic transmission includes electro-hydraulic elements internal to the transmission which are operable to inhibit the supply of fluid pressure for engaging the forward and reverse speed ranges of the transmission. The electro-hydraulic elements are activated in response to various operating parameters of the vehicle, including range selector position, engine throttle position, depression of the service brake pedal, vehicle speed, etc. The mechanism does not interfere with movement of the transmission range selector, and includes a mechanical link for overriding the interlock function when the range selector is moved to a LO forward range, thereby providing an override in the event of a failure of the electro-hydraulic elements.
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Ortman Walter J.
Vukovich William J.
General Motors Corporation
Lorence Richard
Navarre Mark A.
Trousdell William O.
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